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pub trait Enum: std::fmt::Debug {
fn name() -> &'static str;
fn from_text(value: &str) -> crate::Result<Box<Self>>;
}
impl<E: Enum> crate::Composite for E {
fn name() -> &'static str {
E::name()
}
fn to_sql(&self) -> crate::Result<Option<Vec<u8>>> {
use crate::ToSql;
format!("{:?}", self).to_sql()
}
fn from_text(
_: &crate::pq::Type,
raw: Option<&str>,
) -> crate::Result<Box<Self>> {
Self::from_text(crate::not_null(raw)?)
}
fn from_binary(
ty: &crate::pq::Type,
raw: Option<&[u8]>,
) -> crate::Result<Box<Self>> {
use crate::FromSql;
Self::from_text(&String::from_binary(ty, raw)?)
}
fn to_vec(&self) -> Vec<&dyn crate::ToSql> {
unreachable!()
}
fn from_text_values(
_: &crate::pq::Type,
_: &[Option<&str>],
) -> crate::Result<Box<Self>> {
unreachable!();
}
fn from_binary_values(
_ty: &crate::pq::Type,
_values: &[Option<&[u8]>],
) -> crate::Result<Box<Self>> {
unreachable!()
}
}
#[cfg(test)]
mod test {
#[derive(crate::Enum, Debug, PartialEq)]
#[r#enum(internal)]
enum Mood {
Sad,
Ok,
Happy,
}
crate::sql_test!(mood, super::Mood, [
("'Sad'", super::Mood::Sad),
("'Ok'", super::Mood::Ok),
("'Happy'", super::Mood::Happy),
]);
}